Oscillating valve for steam-engines.



PATENTED MAY 22, 1906.

T. V. ELL.IOTT.. OSOILLATING VALVE FOR STEAM ENGINES.

APPLICATION FILED MAY 11, 1905.

2 SHEETS-SHEET 1.

WiTNESSES:

, PATENTED MAY 22, 1906. T. v. ELLIOTT. OSOILLATING VALVE FOR STEAMENGINES.

APPLICATION FILED MAY 11, 1905.

2 SHEETS-SHEET 2.

ATTOR tatc of New York, have invented a new and improved GscillatmgValve for Steam-En-' Unitarian sw m PATENT @FFIGE.

Specification of Letters Patent.

Patented may 22, 3.906.

Application filed liiay 11, 1905. Serial No. 259,899.

To all whom, it may concern.-

Be it known that l, THADDIOUS V. ELLIOTT, a citizen of the UnitedStates, and a resident of the city of New York, Flatbush, borough ofBrooklyn, in the county of Kings and gines, of which the following is afull, clear, and exact description. v

The invention relates to the two-cylinder type of reciprocating engines;and its object is to provide a new and improved oscillating valve forcontrolling the admission and exhaust of the motive agent to and fromthe cylinders in a very simple manner and without danger of leakage ofthe motive agent.

The invention consists of novel features and parts and combinations ofthe same, as

will he more fully described hereinafter and then pointed out in theclaims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a sectional side elevation of the improvement as ap lied ona two-cylinder engine, the section eingon the line 1 1 of Fig. 3.

Fig. Sis an enlarged sectional plan view of the same on the line 3 3 ofFig. 1. the'same on the line 4. 4 of Fi 1, and Fig. 5 is an enlargedsectional side e ovation of the cross-head and its connection with thestem of the oscillating valve.

in the cylinders A and A of the engine are mounted to reciprocatepistons B and B, connected by pitmen C and C with crankarms D and D,arranged. on the main shaft E and set at an angle one relative to theother, as is usual in engines of this type.

Between the cylinders A and A is held a bushin r F, in which is mountedto oscillate a valve (1, having its vertically-disposed valvestem Hextending downwardl through a suitable stuiling-hox to the on side, andon the outer end of this valve-stem El is arranged. a spiral H, engagedby a pin or a similar device i, held on a yoke I, provided withfriction-rollers l and l in enga ement with the peripheral surface of acam secured on the main shaft E. The yoke I is provided with anelongated aperture 1 (see dotted lines, Fig. 2, through which. passesloosely the shaft it, it being understood that when the vvalve G in itsbushirn Fig. 2 is a cross-section of the same on the line 2 2 of Fig. 1.

Fig. 4 is a similar view of engine is in moticnand the shaft E isrotated, and with it the cam J, then the latter imparts an up-and-downreciprocating motion to the yoke I, which by its connection with thesgiral groove H of the valve-stem I-l rocks is e latter, and conseguently oscillates the' in order to insure an easy running of thevalve G,the bottom thereof is mounted on a suitable ball-hearing K, as plainlyindicated in Fig. Land the top of the said valve is centrally engaged bya center L.

in the bushing F is arran ed an inlet-port a, registering with a cy-liner inlet-port a, connected by a pipe with a source of motiveagent suply, such as a. boiler, and in the said bushing E ic also arranged anoutletort b, in re ister with aneXhaust-port b, t irough whic-.passesthe exhaust-steam to a suitable place of discharge by means-of anexhaustpipe or otherwise. The oscillating valve G is made cylindricaland is provided with a horizontally-dis osed partition G, forming astea1n-inlet c amber G and an exhaust chamber G the inlet-chamber Gbeing in register at all times with the inlet-port a, and theexhaust-chamber G being in register at all times with the exhaustportZ). (See Figs. 3 and 4.) The inlet-chamber G is adapted to connectalternately with ports 0 and (1,- formed in the bushing F and inregister at all times with the cylinder-ports c and l), leadin into theu per or working ends of the cylin ersA and. respectively. In thechamber G extend op ositely-disposed vertical partitions G and whichform passages e and f, both 0 ening at their lower ends into theexhaust-c amber G The upper end of the passage 6 is adapted to connectwith the port 0, and the upper end of the passage f is adapted toconnect with the port 03, said passages being, however, arranged in suchmanner that when the chamber G is in register with the port a then theport (2 is in register with the passage while the passage 6 is out ofregister with t e port a. When the valve G is oscillated and reaches itsextreme position, as shown in dotted lines in Fig. 3, then. the passagef is out off from the port d, and the passage 6 connects with the porta, and the chamber (i connects with the port at.

When the engine is in operation and the several parts are in theposition shown in the drawings, then the motive agent passing throughthe port a into the chamber G can pass by way of the ports 0 c inth theupper der A.

end of the cylinder A to act on the piston B venti-on,

therein, so as to-force the latter in a downward direction. While thistakes place the upper end of the other cylinder A is connected by way ofthe ports (1 d and passage with the exhaust-chamber G", o en at alltimes with the exhaust-ports b d toallow the motive agent to exhaustfrom the cylin- VVhile the piston B is descending the other piston B isrising, so that the motive agent is completely exhausted from thecylinder A. When the piston B in its downward stroke reaches a 'cut-ofiposition govtion.

erne'd by the shape of the cam J, then the latter'causes avturnlng ofthe valve G to 'move the same to its extreme other position abovedescribed, so that the motive agent is now shut ofl from the cylinder A,to allow the steam in the cylinder A to act expansively until the istonB reaches its lowermost posihen this takes place, the piston B reachesits uppermost position, and the valve G is now turned sufficientlyto-conne'ct the chamber G; with the port d, so as to allow the motive aent to pass into the upper end of the cylin er A to act on the piston 13therein and force the same downward on its downstroke. During this timethe piston B rises, and as the port cis now in register with the passagee it is evident that the exhaust-steam in the cylinder A can escape byway of the ports 0 and c passage 1;, chamber G and'exhaust orts b b. Itis understood that by giving iiferent forms to the cam J the valve G canbe turned to out off sooner or later relative to the chamber Gr and theports 0 and d v The mechanism for oscillating the valve directly fromthe main shaft E may be varied without deviating from the spirit of myinit being understood that by the particular construction of the valve Gdescribed and shown the motive agent is admitted and exhaustedfi'omthecylinders A and A in the proper sequence to insure an easy running ofthe engine, to utilize the motive agent to the fullest advantage, and toprevent undue leakage of steam.

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent- I 1. An engine comprising cylinders, istonsreciprocating therein, a main shaft aving crank-arms standin at an angleand connected with the sai pistons, an oscillating val've actuated fromthe s'ai main shaft an controlling the admission and the exhaust ofthemotive agent to and from the said cylinders in the proper sequence,and mechanism for oscillating the said valve, comprising a cam on themain shaft and a yoke reciprocated by the said cam and engaging the stemof the said valve to rotate the latter.

2. An engine comprising cylinders, istons reciprocating therein, a mainshaft aving. crank-arms standing at an angle and connected with the saidpistons, an oscillatin v'alve having a fixed valve-stem provide with asiral, a yoke engaging the said spiral, to oscil ate the latter on reciro'cating the yoke, anda cam on the main s the said yoke to reciprocatethe same. f

In testimony whereof I have signed my name to this specification in twosubscribing witnesses.

THADDIOUS V. ELLIOTT.

Witnesses:

F. W. HANAF'QRD, EVERARD B. MARSHALL;

aft, enga ing thepresence of

